~/.ssh> ssh -T git@github
ssh: Could not resolve hostname github: Name or service not known
xuan@SUSE:~/.ssh> ssh -T git@github.com
The authenticity of host 'github.com (192xxx3)' can't be established.
RSA key fingerprint is 16:27:axxx6:48 [MD5].
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'github.com,192.xxx3' (RSA) to the list of known hosts.
Hixxx You've successfully authenticated, but GitHub does not provide shell access.﻿​